Steven Rostedt (VMware) 581695e615 tracing: Disable trace_printk() on post poned tests ... commit 78041c0c9e upstream. The tracing seftests checks various aspects of the tracing infrastructure, and one is filtering. If trace_printk() is active during a self test, it can cause the filtering to fail, which will disable that part of the trace. To keep the selftests from failing because of trace_printk() calls, trace_printk() checks the variable tracing_selftest_running, and if set, it does not write to the tracing buffer. As some tracers were registered earlier in boot, the selftest they triggered would fail because not all the infrastructure was set up for the full selftest. Thus, some of the tests were post poned to when their infrastructure was ready (namely file system code). The postpone code did not set the tracing_seftest_running variable, and could fail if a trace_printk() was added and executed during their run. Cc: stable@vger.kernel.org Fixes: 9afecfbb95 ("tracing: Postpone tracer start-up tests till the system is more robust") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-03-11 18:02:50 +01:00
..
blktrace.c	tracing/blktrace: Fix to allow setting same value	2018-09-09 19:55:57 +02:00
bpf_trace.c	bpf: fix check of allowed specifiers in bpf_trace_printk	2018-12-17 09:28:50 +01:00
ftrace.c	ftrace: fpid_next() should increase position index	2020-02-28 16:36:07 +01:00
Kconfig	tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y	2018-02-22 15:42:13 +01:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
power-traces.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ring_buffer.c	trace: Fix preempt_enable_no_resched() abuse	2019-05-02 09:40:28 +02:00
ring_buffer_benchmark.c	ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU	2017-08-02 14:23:02 -04:00
rpm-traces.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace.c	tracing: Disable trace_printk() on post poned tests	2020-03-11 18:02:50 +01:00
trace.h	ftrace: Protect ftrace_graph_hash with ftrace_sync	2020-02-14 16:32:13 -05:00
trace_benchmark.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_benchmark.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_branch.c	Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP"	2019-07-03 13:15:57 +02:00
trace_clock.c
trace_entries.h	tracing: Fix missing tab for hwlat_detector print format	2018-04-29 11:33:17 +02:00
trace_event_perf.c	perf/ftrace: Fix double traces of perf on ftrace:function	2017-08-29 13:29:29 +02:00
trace_events.c	tracing: Fix lock inversion in trace_event_enable_tgid_record()	2020-01-09 10:17:56 +01:00
trace_events_filter.c	tracing: Fix regex_match_front() to not over compare the test string	2018-05-16 10:10:27 +02:00
trace_events_filter_test.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_events_hist.c	tracing: Use strncpy instead of memcpy for string keys in hist triggers	2019-03-23 14:35:19 +01:00
trace_events_trigger.c	trigger_next should increase position index	2020-02-28 16:36:07 +01:00
trace_export.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_functions.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_functions_graph.c	tracing/fgraph: Fix set_graph_function from showing interrupts	2019-05-16 19:42:27 +02:00
trace_hwlat.c	tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency	2019-10-17 13:43:58 -07:00
trace_irqsoff.c	tracing/fgraph: Fix set_graph_function from showing interrupts	2019-05-16 19:42:27 +02:00
trace_kdb.c	tracing: Silence GCC 9 array bounds warning	2019-06-25 11:36:50 +08:00
trace_kprobe.c	tracing: Quiet gcc warning about maybe unused link variable	2018-08-03 07:50:21 +02:00
trace_mmiotrace.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_nop.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_output.c	tracing: Reorder display of TGID to be after PID	2018-07-17 11:39:30 +02:00
trace_output.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_printk.c
trace_probe.c	tracing: probeevent: Fix to support minus offset from symbol	2018-03-28 18:24:42 +02:00
trace_probe.h	tracing: probeevent: Fix to support minus offset from symbol	2018-03-28 18:24:42 +02:00
trace_sched_switch.c	tracing: Fix sched switch start/stop refcount racy updates	2020-02-14 16:32:07 -05:00
trace_sched_wakeup.c	kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail	2020-01-14 20:05:40 +01:00
trace_selftest.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_selftest_dynamic.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_seq.c
trace_stack.c	tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined	2020-01-14 20:05:40 +01:00
trace_stat.c	tracing: Fix very unlikely race of registering two stat tracers	2020-02-28 16:35:58 +01:00
trace_stat.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_syscalls.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_uprobe.c	tracing/uprobes: Fix output for multiple string arguments	2019-02-20 10:20:53 +01:00
tracing_map.c	tracing: Have the histogram compare functions convert to u64 first	2020-01-09 10:17:56 +01:00
tracing_map.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00